3. Stamps are sold in a 10 by 10 sheet. The total value of a sheet of stamps is $60.00. a) Express the number of stamps as a power and in standard from

There is a total of 100 stamps, or 10² stamps.

Explanation:

10•10=100 (standard form)

100 can be written as 10² in scientific notation (power)

Let x = cost of one t-shirt

Let y = cost of one sweatshirt

Jayden: 9x + 3y = $420

Carson: x + 6y = $296. Multiply Jayden's equation by -2

Jayden: -18x - 6y = $-840

Carson: x + 6y = $296. Add the equations together to eliminate variable y.

New equation: -17x = $-544. Divide each side by -17.

x = $32. Plug this value into one of the original equations.

32 + 6y = $296. Subtract 32 from each side.

6y = 264. Divide each side by 6.

y = 44.

Plug both your x and y value into one of the equations to ensure they're correct.

9(32) + 3(44) = 420

420 = 420.

x = 32

y = 44.